ASRock Radeon RX 580 GPU heating like crazy

My videocard is not overheating, I watch it carefully, but it heats up to 79-89 degrees in games like Rust, Scrap Mechanic etc. I changed a thermal paste and it helped for about a month, than the problem came back. I tried installing and changing settings in radeon software, but it made it worse, so I rolled it back. My specs are: Ryzen 5 1600x, 16 GB RAM, Asus prime A320M (motherboard), ASRock Phantom Gaming Radeon RX 580, chiefteck smart series PSU.
Pleasegive me an advise how to lower my GPU temerature.